#include "ros/ros.h"
#include "std_msgs/String.h"
#include <sstream>
int main(int argc, char **argv)
{
    ros::init(argc,argv,"talker");
    ros::NodeHandle n;
    ros::Publisher chatter_pub = n.advertise<std_msgs::String>("chatter",1000);
    ros::Rate loop_rate(10);
    int count = 0;
    while(ros::ok()){
        std_msgs::String msg;
        std::stringstream ss;
        ss << "hello world" << count;
        msg.data = ss.str();

        ROS_INFO("%s",msg.data.c_str());
        chatter_pub.publish(msg);

        ros::spinOnce();
        loop_rate.sleep();
        ++count;
    }

    return 0;
}
